Molecular evidence from a 2-million-year-old southern African hominid species indicates sex and genetic differences in P. robustus.

The Trump administration is cutting $1 billion in grants that support student mental health. That has educators worried.

A new genetic study could help saolas survive by enabling better searches through environmental DNA. But some experts fear they may be extinct already.

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.